Case study: broken instrument...Case study: broken instrument Dr. Claudia Michl, M.Sc. DentoDoc...
Transcript of Case study: broken instrument...Case study: broken instrument Dr. Claudia Michl, M.Sc. DentoDoc...
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Case study:
broken instrument
Dr. Claudia Michl, M.Sc.
DentoDoc
Carl-Jordanstraße 9
D-83059 Kolbermoor
University of Pennsylvania
TEC2 Next Level
November 2016
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Starting point
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Starting point
43 year old patient with acute pain in 2. quadrant
OPG area 26 to 27:
Tooth 27: occlusal distal shows filling next to pulp as well
as occlusal mesial another filling with other material,
which seem to be mesially insufficient
X-ray: periradicular as well as apikal with no clinical
report
Filling at 27 occlusal –distal: was exchanged 3 days ago
due to acute pain of the patient
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Examination
1. percussion: :
24,25,26,34,35,36,37 negative
27 definitely positive
2. pulp test with dichlorofluromethane (cold spray):
27 hypersensitive
4. parodontal screening 25-27 PSI Gard 2
5. palpation in area 27:
No pain apical
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Diagnosis
Irreversible Pulpitis with suspision at apical parodontitis tooth 27
Treatment recommendation:
Endodontic treatment at tooth 27 with surgical microscope
Removal of old filling with Composite,
Removal of caries prior to opening of pulpa
Trepanation
Treatment of root channels down to apical constriction
Disinfektion
Opturation und occlusal closure with Composite
Prothetic suply of tooth 27 with gold or ceramic crown
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X-ray upon endometric legth
measurement
Distal Chanel: remarkably curved to distal
During straight approach towards the channel, the BRO file
of Biorace cracked in the middle third of the distal channel
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X-ray upon endometric legth
measurement
X-ray mesial eccentric
Mb1: 19mm ( Iso10 R)
Pal: 19mm ( Iso 20 R)
Db: Fracture BRO File
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Removal of fragment
via surgical microscope via
ultrasonic technique Broadening and straigthening of coronal entry with
cut Gates- Glidden 2 coronal part of fragment is visible
circular vibrating of fragment via Endo- Chuck Needle
Irrigation with EDTA 17 %
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Cracked BR-0 Instrument
removed and X-ray Disto-buccal
Db: 19mm ( Iso 15)
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Apical Sizing
Initial rotary File final apiakal Size
Mb1: Iso 10 MB1: Iso 35
Db: Iso 15 Db: Iso 35
P: Iso 20 P: Iso 40
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Treatment and Disinfection
BioRaCe
Preparation of path 010,015, under humid conditions , rubberdam and DOM
Reamer 010,015, manually
BR0 coronal opening of channel entry
Verification of path with file
Reamer 015,020
BR1,BR2,BR3 shaping coronal and middle channel third
BR4, BR5 shaping apical channel third
irrigation protocol
• 1. treatment: changing lavage 3,5%
NaOCl, 17% EDTA , processing at humid
conditions
• Ultrasonication of lavage solutions
• sustained injection of CaOH into the
root channel
• 2. treatment: analog 1. treatment
without ultrasonication
• Drying and opturation of channels
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Opturation Single Cone Opturation Technique Guttapercha und TOTAl Fill
Masterpoint posttreatment radiograph
Opturation and cover the floor of the pulp
chamber with a line of bonded material after
removal of excess gutta-percha to the canal
orifice
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Epicrisis During the preparation of the access cavity, a crack of the
instrument (BR0 file, BioRaCe Systems) at the distal root occured
The top of the file of the rotary instrument got stuck within the lower middle channel third. This was caused by a pronounced root curvature of the distal channel as well as the insufficient straigthening of the entry cavity before insertion of the rotary instrument
The instrument fracture was due to exceeding torsion forces of the NiTI file with the channel lumen. The patient was informed immediately upon the accient and a X ray was recorded to investigate the location of the instrument within the channel
As the instrument was located at the middle channel third and was clearly visible with the dental microscope, the risk of infection of the non-accessible part of the root channel might be increased, we decided to try to remove the instrument
Prior to the removal, the patient was thoroughly informed about the procedure
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Epicrisis
The instrument could be removed successfully via the
dental microscope and ultrasonication
The channels of tooth 27 could be treated thoroughly and
filled completely
The prognosis for tooth 27 seems to be promising based on
study results, especially because of the lack of a apical
parodontisis at the distal root prior to the treatment*
* Zitat: DZZ 62(08)2007(S.534/535)
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Thanks for your attention
Questions?